The bank is in the middle of constant foot and car traffic, Hanley said, so a robber can blend into the area after fleeing the scene.

"It's easy to disappear into the neighborhood," he said.

In the morning robbery, the two suspects approached a counter at the bank, police said. One asked for money and passed a note under the window before the teller handed him the cash he demanded. The two men then left the scene, but patrol officers caught them almost immediately as they ran down the 700 block of 27th Street.

Trent said one suspect had a "considerable" amount of cash in his front pocket and was armed with a knife. The other suspect was unarmed. Witnesses told police the two men were acting suspicious in the area throughout the morning, police said.

As the police compiled their reports on the first robbery, another robber approached the counter just after 1 p.m.

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Trent said the suspect was a black male about 5-foot-10 with an average build. The man wore black pants, black and white tennis shoes, a black medium-sleeved shirt and a dark blue bandanna. Police believe he carried a handgun at the time of the robbery.

A representative of 1st Source Bank could not be reached for comment.

Mishawaka resident Doyle Vanderburg snapped photographs of police as they congregated outside the bank Tuesday morning. Vanderburg said he has banked with 1st Source for more than 40 years.

"I know (my money is) insured, but just the thought that this one has been robbed so many times ... it just seems like the bad guy is a step ahead," Vanderburg said. "I bet there's not a bank in South Bend and Mishawaka that has been robbed as much."